Raw Hash Functions

The nacl library comes with sha256 and sha512 hashing libraries. They do not
seem to offer any benefit over python's hashlib, but for completeness they are
included. Creating a hash of a message is very simple:

import libnacl
msg ='Is there someone else up there we could talk to?'
h_msg = libnacl.crypto_hash(msg)

crypto_hash defaults to sha256, sha512 is also available:

import libnacl
msg ='Is there someone else up there we could talk to?'
h_msg = libnacl.crypto_hash_sha512(msg)